Oldsmobile Delta 88 Royale MPG

Its best-rated version reaches 21 MPG combined in 1985, with its diesel version. Its weakest year peaked at 19 MPG (1987).

lowest to best versionbest versionmedian of its classengine list turned over

789.5 gal

a year at 15,000 miles for the best 1987 version. Put it next to its 1985 predecessor, at your own mileage.

Compare in gallons

The Oldsmobile Delta 88 Royale has EPA ratings for three model years, 1985–1987, every one of them among large cars. Its best version ranked second (tied) of 15 large cars in 1986, behind the class leader, the Saab 9000, and it placed in its class top five in three model years.

Of the 991 car nameplates on this site, few have had a diesel version (60 of them); this one has.

Among 15 large cars, 1987

The Delta 88 Royale placed second (tied). The class leader was the Saab 9000 at 21 MPG.

Where the engine list turned over

1986
New: 3.0-liter 6-cylinder. Best rating 21 → 20 MPG.

Powertrains under the name

Diesel
Rated in 1985.
Gasoline
Rated in 1985–1987.

All 3 model years, best and lowest version

Model years	Best version	Combined	City / hwy	Lowest version	Versions
1987	Delta 88 Royale	19	16 / 25	19	1
1986	Delta 88 Royale	20	17 / 27	19	2
1985	Delta 88 Royale diesel	21	18 / 27	17	7

Same class, 1987

Saab 900021 MPG Mercury Grand Marquis19 MPG Oldsmobile Ninety-Eight Regency19 MPG Rolls-Royce Silver Spur Limousine9 MPG